[Sukotto]

Screenwriters for "Conan the Barbarian" (1982) might have got it from Part 2, Chapter XI of "Genghis Khan The Emperor Of All Men" by H. Lamb (1936).

https://archive.org/details/genghiskhantheem035122mbp/page/n...

  One day in the pavilion at Karakorum he asked
  an officer of the Mongol guard what, in all the
  world, could bring the greatest happiness.

  "The open steppe, a clear day, and a swift horse
  under you," responded the officer after a little
  thought, "and a falcon on your on your wrist to
  start up hares."

  "Nay," responded the Khan, "to crush your enemies,
  to see them fall at your feet -- to take their 
  horses and goods and hear the lamentation of 
  their women. That is best."